In a statement this morning the airline said on its website: “After IT issues with check-in at a number of airports this morning, we are now checking in customers at London Heathrow and Gatwick Airport as normal.”

The airline also had to apologise to passengers in July after long delays at check-in at Heathrow and Gatwick, when BA upgraded its check-in system, leading to length queues on one of the busiest days of the year for the airport.